Modeling and damping controller design for static var compensator

Shunt flexible transmission systems (FACTS) devices are employed to control the damping of electrical power system oscillations. It can operate either in capacitive mode or in inductive mode. Static var compensator (SVC) is utilized for controlling reactive power of power system and regulating the voltage. This paper presents the effects of a SVC-FACTS controller on the electromechanical oscillations damping of single-machine infinite-bus power system. To this end a damping controller is designed using the root locus method. Finally, the role of SVC in improving stability is shown by simulation results and parameters variations on power system responses are discussed.